at least DEX 20 point and at least Bash 1 Point
↓↘→ B and then ↓↘→ B
Use Bash after Bash (ground only)
Combo Bash into Bash. You can keep chaining them as long as they hit. You still use the 30SP for each consecutive Bash.
You can also chain this from Second Bash (10SP) if you have Fatal Blow, allowing a chain for average 20SP per hit of Bash -> Second Bash -> Bash -> Second Bash -> ...
Due to damage scaling, the longer the combo, the less damage the next hit will do. After about 14 Bashes, each subsequent Bash will deal 1 damage.
Same as Bash.